Title :
A 5 V, 118 dB /spl Sigma//spl Delta/ analog-to digital converter for wideband digital audio
Author :
Leung, K.Y. ; Swanson, E.J. ; Kafai Leung ; Zhu, S.S.
Author_Institution :
Crystal Semicond. Corp., Austin, TX, USA
Abstract :
Digital signal processing can replace analog signal processing in professional audio equipment only when analog-to-digital converter dynamic ranges approach 120 dB. Super-high-end audio applications extend the audio band beyond 30 kHz and require 96 kHz sampling frequency. This paper describes a multi-bit /spl Sigma//spl Delta/ modulator developed for high-end digital audio. The modulator is a single-loop, seventh-order type with a 3-level quantizer. The modulator samples the analog input at 6.144 MHz and has 140 dB signal-to-quantization noise in a 48 kHz bandwidth. The device is fabricated in a double-poly, double-metal, 0.8 /spl mu/m CMOS process.
Keywords :
CMOS integrated circuits; Hi-Fi equipment; integrated circuit noise; sigma-delta modulation; /spl Sigma//spl Delta/ analog/digital converter; 140 dB; 3-level quantizer; 48 kHz; 6.144 MHz; 96 kHz; ADC dynamic range; audio equipment; digital signal processing; double-poly double-metal CMOS process; multi-bit /spl Sigma//spl Delta/ modulator; seventh-order type; single-loop type; wideband digital audio; Analog-digital conversion; Calibration; Capacitors; Digital modulation; Dynamic range; Frequency; Quantization; Sampling methods; Semiconductor device noise; Wideband;
Conference_Titel :
Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3721-2
DOI :
10.1109/ISSCC.1997.585340
